Recent results on Kaon decays from NA48/2

Apr 11, 2019, 12:03 PM
Palazzo Badini-Confalonieri - Sala Lauree

Palazzo Badini-Confalonieri - Sala Lauree

Via Verdi, 10 Turin
Parallel Session Talk WG4: Hadronic and Electroweak Observables WG4: Hadronic and Electroweak Observables


Prof. Andrea Bizzeti (Universita di Modena e Reggio Emilia e INFN, Firenze (IT))


Final results of recent NA48/2 measurements are presented.
The charged kaon semileptonic form factors have been precisely measured from 4.4 million Ke3 and 2.3 million Kmu3 events collected in 2004.
In addition, the first observation of the K+- -> pi+- pi0 e+ e- decay is reported, with a sample of about 4900 candidates and less than 5% background.
The measured branching ratio in the full kinematic region is (4.24 +- 0.14)x10-6, in good agreement with ChPT predictions.

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